maiden Kureha and has taken the Dark Dragon Blade. Ryu is cut down by Doku with the stolen Blade, but he is brought back to life as a "soldier of revenge" by a falcon, the spiritual animal of the Hayabusa clan. Seeking vengeance for Kureha's death, Ryu learns from Murai that the raiders were from Vigoor, so he stows away on an airship bound for the empire. Fighting his way through the streets of its capital city, Tairon, Ryu faces several bosses including the three Greater Fiends. He defeats Alma in a battle that wrecks the city, but leaves her to Rachel's mercy. Conversely, Rachel cannot bring herself to kill her sister, and instead is taken by Doku, who prepares to sacrifice her in a ritual to enhance Alma's power. With Alma's help Ryu rescues Rachel and destroys Doku's spirit, but with his dying breath Doku casts the blood curse on Ryu. The only way for Ryu to lift the curse is to kill the emperor, so he storms the palace, defeating Marbus who bars his way to the emperor's personal realm. Two successive boss fights must be completed to destroy the Emperor and reclaim the Dark Dragon Blade—once this is accomplished his realm starts to destruct. Ryu must then be maneuvered up a series of ledges to escape, but in the process he loses his grip on the Dark Dragon Blade. The fallen Blade lands at the feet of a figure, the Dark Disciple, who has been shadowing Ryu throughout the game. Taking the Blade, the Disciple reveals himself to be the clan leader Murai. He admits that the raid on Hayabusa village was part of his plan to restore the Blade's evil power, using souls harvested by Ryu. Drawing on the Blade, Murai transforms himself, setting the stage for the final boss fight. Ryu defeats Murai and shatters the Blade with the True Dragon Sword. Victorious, Ryu turns himself into a falcon and flies to the Hayabusa village. In the game's final scene he places the Dragon Eye, used to enhance his sword, on Kureha's tombstone and disappears into the night. The story of Ninja Gaiden is continued in the sequels Ninja Gaiden: Dragon Sword, Ninja Gaiden II and Ninja Gaiden 3. Development In 1999, Team Ninja started work on the "Next-Generation Ninja Gaiden Project". The first stage of development was to create the game on the Sega